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Κυριακή 15 Ιουλίου 2018

Disseminated BCG-osis with haemophagocytosis, tubercular bacteraemia, and unusual haematological findings with its haematology analyser-based expression

Abstract

Infantile disseminated BCG-osis is an uncommon complication of BCG vaccination and the presence of haemophagocytic lymphohistiocytosis (HLH) further complicates the clinical course due to its fatal outcome. Here, we describe a rare case of disseminated BCG-osis with HLH in a 3-month-old male child and the unusual morphological findings in the peripheral blood with its haematology analyser-based expression. The child presented with fever, failure to thrive, hepatosplenomegaly, erythematous skin rashes, and left axillary lymphadenopathy with history of BCG vaccination at birth. He was the first born of second-degree consanguineous marriage with no significant family history of immunodeficiency disorders. Laboratory findings included anaemia, thrombocytopenia, hyperferritinaemia, hypertriglyceridaemia, and hypofibrinogenaemia which supported a diagnosis of HLH. The peripheral blood showed evidence of phagocytosis by neutrophils, pseudo-Chediak-Higashi-like inclusions, blue-green inclusions, and intra-cytoplasmic vacuoles with shadowy appearance and cellular debris in the background. Acid-fast bacilli were demonstrated in the peripheral blood by Ziehl-Neelsen stain. His clinical condition gradually worsened with multi organ failure and fatality.



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